I just placed the holy trinity of Advanced Dungeons & Dragons up for auction.
Copying the auction notes and photos here for posterity:
Adv Dungeons & Dragons Players Handbook Dungeon Masters Guide Monster Manual
Matched set, same owner, uncommon printings, white pages
Condition: Exteriors have light general wear. Each has the same name neatly-written inside front cover (not shown for privacy), and a date (“Oct 80”). PHB has some erased notes inside back cover; otherwise no writing in the books. All have very nice clean pages. See further on the description for printings. See photos.
Printings: I use the printing notes at The Acaeum.
While these aren’t “rare” printings, they seldom come though the shop, and rarely in this condition.
DMG is 6th Beta with the survey and the perforated chart page
MM is 4th Gamma printing
PHB is 6th printing, with orange flyleaves
Shipping weight is 4 pounds, plus packaging. Will be shipped well-protected.
EDIT 7/13/2019: Sold for $115.27 in 46 bids.